I think EPG depends from TV providers too. Some users from russian forum reported, trick works well with Other. It has been checked with success on firmwares:
T-CHL7DEUC
T-CHU7DEUC
T-CHL5DEUC
and witch changing of:

By strange reasons settings (+7...+12) do not work at all.
I`m wondering why i got error in Other, but success in Slovakia...
So we need one working country-setting for all firmwares. Or might we could have at least two countries to set in patcher (Other and Slovakia?) I know, the simplest way is to have one than more settings to patch...